To be careless, negligent, or awkward, especially with regard to dress and neatness.(verb)
To be wasteful.(verb)
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Use "slatter" in a sentence
"“What do those deserve, who deliberately utter falsehoods,” continued the Monk, “who deceive, and slatter young men to their destruction?”"
"I can't just subject my defence force to open slatter by these criminals."
"A little girl who was visiting Mr. Storrs said: “It would never do for Mr. Greeley to go to Congress, he would make such a slitter-slatter of the place.”"